LINE 6 - Dt 50 Head Advanced HD modeling technology Reinhold Bogner's most flexible tube design (2) 12AX7 preamp, (2) EL34 power amp (25W/50W) Each channel: Drive, Bass, Mid, Treble, Presence, Reverb, Channel Volume Master volume High and Low inputs Reconfigurable analog components (Class A/Class AB; Pentode/Triode) Complete, one-touch analog reconfiguration (via Channel select switch) Low-power mode MIDI in and out L6 LINK™ in/thru connection for POD® HD integration Footswitch jack for channel switching Serial effect loop with level control XLR direct out with cabinet simulation and ground lift switch 4, 8 and 16-ohm speaker outs